The Tcpdump Group git mirrors - tcpdump/blob - print-hncp.c

   1 /*
   2  * Copyright (c) 2016 Antonin Décimo, Jean-Raphaël Gaglione
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. Neither the name of the project nor the names of its contributors
  13  *    may be used to endorse or promote products derived from this software
  14  *    without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 /* \summary: Home Networking Control Protocol (HNCP) printer */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #include <netdissect-stdinc.h>
  36
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 #include "netdissect.h"
  41 #include "addrtoname.h"
  42 #include "extract.h"
  43
  44 static void
  45 hncp_print_rec(netdissect_options *ndo,
  46                const u_char *cp, u_int length, int indent);
  47
  48 void
  49 hncp_print(netdissect_options *ndo,
  50            const u_char *cp, u_int length)
  51 {
  52     ND_PRINT((ndo, "hncp (%d)", length));
  53     hncp_print_rec(ndo, cp, length, 1);
  54 }
  55
  56 /* RFC7787 */
  57 #define DNCP_REQUEST_NETWORK_STATE  1
  58 #define DNCP_REQUEST_NODE_STATE     2
  59 #define DNCP_NODE_ENDPOINT          3
  60 #define DNCP_NETWORK_STATE          4
  61 #define DNCP_NODE_STATE             5
  62 #define DNCP_PEER                   8
  63 #define DNCP_KEEP_ALIVE_INTERVAL    9
  64 #define DNCP_TRUST_VERDICT         10
  65
  66 /* RFC7788 */
  67 #define HNCP_HNCP_VERSION          32
  68 #define HNCP_EXTERNAL_CONNECTION   33
  69 #define HNCP_DELEGATED_PREFIX      34
  70 #define HNCP_PREFIX_POLICY         43
  71 #define HNCP_DHCPV4_DATA           37
  72 #define HNCP_DHCPV6_DATA           38
  73 #define HNCP_ASSIGNED_PREFIX       35
  74 #define HNCP_NODE_ADDRESS          36
  75 #define HNCP_DNS_DELEGATED_ZONE    39
  76 #define HNCP_DOMAIN_NAME           40
  77 #define HNCP_NODE_NAME             41
  78 #define HNCP_MANAGED_PSK           42
  79
  80 /* See type_mask in hncp_print_rec below */
  81 #define RANGE_DNCP_RESERVED    0x10000
  82 #define RANGE_HNCP_UNASSIGNED  0x10001
  83 #define RANGE_DNCP_PRIVATE_USE 0x10002
  84 #define RANGE_DNCP_FUTURE_USE  0x10003
  85
  86 static const struct tok type_values[] = {
  87     { DNCP_REQUEST_NETWORK_STATE, "Request network state" },
  88     { DNCP_REQUEST_NODE_STATE,    "Request node state" },
  89     { DNCP_NODE_ENDPOINT,         "Node endpoint" },
  90     { DNCP_NETWORK_STATE,         "Network state" },
  91     { DNCP_NODE_STATE,            "Node state" },
  92     { DNCP_PEER,                  "Peer" },
  93     { DNCP_KEEP_ALIVE_INTERVAL,   "Keep-alive interval" },
  94     { DNCP_TRUST_VERDICT,         "Trust-Verdict" },
  95
  96     { HNCP_HNCP_VERSION,        "HNCP-Version" },
  97     { HNCP_EXTERNAL_CONNECTION, "External-Connection" },
  98     { HNCP_DELEGATED_PREFIX,    "Delegated-Prefix" },
  99     { HNCP_PREFIX_POLICY,       "Prefix-Policy" },
 100     { HNCP_DHCPV4_DATA,         "DHCPv4-Data" },
 101     { HNCP_DHCPV6_DATA,         "DHCPv6-Data" },
 102     { HNCP_ASSIGNED_PREFIX,     "Assigned-Prefix" },
 103     { HNCP_NODE_ADDRESS,        "Node-Address" },
 104     { HNCP_DNS_DELEGATED_ZONE,  "DNS-Delegated-Zone" },
 105     { HNCP_DOMAIN_NAME,         "Domain-Name" },
 106     { HNCP_NODE_NAME,           "Node-Name" },
 107     { HNCP_MANAGED_PSK,         "Managed-PSK" },
 108
 109     { RANGE_DNCP_RESERVED,    "Reserved" },
 110     { RANGE_HNCP_UNASSIGNED,  "Unassigned" },
 111     { RANGE_DNCP_PRIVATE_USE, "Private use" },
 112     { RANGE_DNCP_FUTURE_USE,  "Future use" },
 113
 114     { 0, NULL}
 115 };
 116
 117 #define DH4OPT_DNS_SERVERS 6     /* RFC2132 */
 118 #define DH4OPT_NTP_SERVERS 42    /* RFC2132 */
 119 #define DH4OPT_DOMAIN_SEARCH 119 /* RFC3397 */
 120
 121 static const struct tok dh4opt_str[] = {
 122     { DH4OPT_DNS_SERVERS, "DNS-server" },
 123     { DH4OPT_NTP_SERVERS, "NTP-server"},
 124     { DH4OPT_DOMAIN_SEARCH, "DNS-search" },
 125     { 0, NULL }
 126 };
 127
 128 #define DH6OPT_DNS_SERVERS 23   /* RFC3646 */
 129 #define DH6OPT_DOMAIN_LIST 24   /* RFC3646 */
 130 #define DH6OPT_SNTP_SERVERS 31  /* RFC4075 */
 131
 132 static const struct tok dh6opt_str[] = {
 133     { DH6OPT_DNS_SERVERS,  "DNS-server" },
 134     { DH6OPT_DOMAIN_LIST,  "DNS-search-list" },
 135     { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
 136     { 0, NULL }
 137 };
 138
 139 static const char *
 140 format_nid(const u_char *data)
 141 {
 142     static char buf[4][11+5];
 143     static int i = 0;
 144     i = (i + 1) % 4;
 145     snprintf(buf[i], 16, "%02x:%02x:%02x:%02x",
 146              data[0], data[1], data[2], data[3]);
 147     return buf[i];
 148 }
 149
 150 static const char *
 151 format_256(const u_char *data)
 152 {
 153     static char buf[4][64+5];
 154     static int i = 0;
 155     i = (i + 1) % 4;
 156     snprintf(buf[i], 28, "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64,
 157          EXTRACT_64BITS(data),
 158          EXTRACT_64BITS(data + 8),
 159          EXTRACT_64BITS(data + 16),
 160          EXTRACT_64BITS(data + 24)
 161     );
 162     return buf[i];
 163 }
 164
 165 static const char *
 166 format_interval(const uint16_t n)
 167 {
 168     static char buf[4][sizeof("000.00s")];
 169     static int i = 0;
 170     i = (i + 1) % 4;
 171     if (n == 0)
 172         return "0.0s (bogus)";
 173     snprintf(buf[i], sizeof(buf[i]), "%u.%02us", n / 100, n % 100);
 174     return buf[i];
 175 }
 176
 177 static const char *
 178 format_ip6addr(netdissect_options *ndo, const u_char *cp)
 179 {
 180     if (EXTRACT_64BITS(cp) == 0x0 && EXTRACT_32BITS(cp+8) == 0xffff)
 181         return ipaddr_string(ndo, cp + 12);
 182     else
 183         return ip6addr_string(ndo, cp);
 184 }
 185
 186 static int
 187 print_prefix(netdissect_options *ndo, const u_char *prefix, u_int max_length)
 188 {
 189     int plenbytes;
 190     static char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx::/128")];
 191     static u_char prefix_v4[5];
 192     if (prefix[0] >= 96 && max_length >= 13 && EXTRACT_64BITS(prefix+1) == 0x0 && EXTRACT_32BITS(prefix+9) == 0xffff) {
 193         prefix_v4[0] = prefix[0]-96;
 194         prefix_v4[1] = prefix[13];
 195         prefix_v4[2] = prefix[14];
 196         prefix_v4[3] = prefix[15];
 197         prefix_v4[4] = prefix[16];
 198         plenbytes = 12 + decode_prefix4(ndo, (const u_char *)prefix_v4, max_length-12, buf, 45);
 199     } else {
 200         plenbytes = decode_prefix6(ndo, prefix, max_length, buf, 45);
 201     }
 202
 203     safeputs(ndo, (const u_char*)buf, 45);
 204     return plenbytes;
 205 }
 206
 207 static int
 208 print_dns_label(netdissect_options *ndo,
 209                 const u_char *cp, u_int max_length, int print)
 210 {
 211     u_int length = 0;
 212     while (length < max_length) {
 213         u_int lab_length = cp[length++];
 214         if (lab_length == 0)
 215             return (int)length;
 216         if (length > 1 && print)
 217             safeputchar(ndo, '.');
 218         if (length+lab_length > max_length) {
 219             if (print)
 220                 safeputs(ndo, cp+length, max_length-length);
 221             break;
 222         }
 223         if (print)
 224             safeputs(ndo, cp+length, lab_length);
 225         length += lab_length;
 226     }
 227     if (print)
 228         ND_PRINT((ndo, "[|DNS]"));
 229     return -1;
 230 }
 231
 232 static int
 233 dhcpv4_print(netdissect_options *ndo,
 234              const u_char *cp, u_int length, int indent)
 235 {
 236     u_int i, t;
 237     const u_char *tlv, *value;
 238     uint8_t type, optlen;
 239
 240     i = 0;
 241     while (i < length) {
 242         tlv = cp + i;
 243         type = (uint8_t)tlv[0];
 244         optlen = (uint8_t)tlv[1];
 245         value = tlv + 2;
 246
 247         ND_PRINT((ndo, "\n"));
 248         for (t = indent; t > 0; t--)
 249             ND_PRINT((ndo, "\t"));
 250
 251         ND_PRINT((ndo, "%s", tok2str(dh4opt_str, "Unknown", type)));
 252         ND_PRINT((ndo," (%u)", optlen + 2 ));
 253
 254         switch (type) {
 255         case DH4OPT_DNS_SERVERS:
 256         case DH4OPT_NTP_SERVERS: {
 257             if (optlen < 4 || optlen % 4 != 0) {
 258                 return -1;
 259             }
 260             for (t = 0; t < optlen; t += 4)
 261                 ND_PRINT((ndo, " %s", ipaddr_string(ndo, value + t)));
 262         }
 263             break;
 264         case DH4OPT_DOMAIN_SEARCH: {
 265             const u_char *tp = value;
 266             while (tp < value + optlen) {
 267                 ND_PRINT((ndo, " "));
 268                 if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
 269                     return -1;
 270             }
 271         }
 272             break;
 273         }
 274
 275         i += 2 + optlen;
 276     }
 277     return 0;
 278 }
 279
 280 static int
 281 dhcpv6_print(netdissect_options *ndo,
 282              const u_char *cp, u_int length, int indent)
 283 {
 284     u_int i, t;
 285     const u_char *tlv, *value;
 286     uint16_t type, optlen;
 287
 288     i = 0;
 289     while (i < length) {
 290         tlv = cp + i;
 291         type = EXTRACT_16BITS(tlv);
 292         optlen = EXTRACT_16BITS(tlv + 2);
 293         value = tlv + 4;
 294
 295         ND_PRINT((ndo, "\n"));
 296         for (t = indent; t > 0; t--)
 297             ND_PRINT((ndo, "\t"));
 298
 299         ND_PRINT((ndo, "%s", tok2str(dh6opt_str, "Unknown", type)));
 300         ND_PRINT((ndo," (%u)", optlen + 4 ));
 301
 302         switch (type) {
 303             case DH6OPT_DNS_SERVERS:
 304             case DH6OPT_SNTP_SERVERS: {
 305                 if (optlen % 16 != 0) {
 306                     ND_PRINT((ndo, " %s", istr));
 307                     return -1;
 308                 }
 309                 for (t = 0; t < optlen; t += 16)
 310                     ND_PRINT((ndo, " %s", ip6addr_string(ndo, value + t)));
 311             }
 312                 break;
 313             case DH6OPT_DOMAIN_LIST: {
 314                 const u_char *tp = value;
 315                 while (tp < value + optlen) {
 316                     ND_PRINT((ndo, " "));
 317                     if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
 318                         return -1;
 319                 }
 320             }
 321                 break;
 322         }
 323
 324         i += 4 + optlen;
 325     }
 326     return 0;
 327 }
 328
 329 /* Determine in-line mode */
 330 static int
 331 is_in_line(netdissect_options *ndo, int indent)
 332 {
 333     return indent - 1 >= ndo->ndo_vflag && ndo->ndo_vflag < 3;
 334 }
 335
 336 static void
 337 print_type_in_line(netdissect_options *ndo,
 338                    uint32_t type, int count, int indent, int *first_one)
 339 {
 340     if (count > 0) {
 341         if (*first_one) {
 342             *first_one = 0;
 343             if (indent > 1) {
 344                 u_int t;
 345                 ND_PRINT((ndo, "\n"));
 346                 for (t = indent; t > 0; t--)
 347                     ND_PRINT((ndo, "\t"));
 348             } else {
 349                 ND_PRINT((ndo, " "));
 350             }
 351         } else {
 352             ND_PRINT((ndo, ", "));
 353         }
 354         ND_PRINT((ndo, "%s", tok2str(type_values, "Easter Egg", type)));
 355         if (count > 1)
 356             ND_PRINT((ndo, " (x%d)", count));
 357     }
 358 }
 359
 360 void
 361 hncp_print_rec(netdissect_options *ndo,
 362                const u_char *cp, u_int length, int indent)
 363 {
 364     const int in_line = is_in_line(ndo, indent);
 365     int first_one = 1;
 366
 367     u_int i, t;
 368
 369     uint32_t last_type_mask = 0xffffffffU;
 370     int last_type_count = -1;
 371
 372     const u_char *tlv, *value;
 373     uint16_t type, bodylen;
 374     uint32_t type_mask;
 375
 376     i = 0;
 377     while (i < length) {
 378         tlv = cp + i;
 379
 380         if (!in_line) {
 381             ND_PRINT((ndo, "\n"));
 382             for (t = indent; t > 0; t--)
 383                 ND_PRINT((ndo, "\t"));
 384         }
 385
 386         ND_TCHECK2(*tlv, 4);
 387         if (i + 4 > length)
 388             goto invalid;
 389
 390         type = EXTRACT_16BITS(tlv);
 391         bodylen = EXTRACT_16BITS(tlv + 2);
 392         value = tlv + 4;
 393         ND_TCHECK2(*value, bodylen);
 394         if (i + bodylen + 4 > length)
 395             goto invalid;
 396
 397         type_mask =
 398             (type == 0)                   ? RANGE_DNCP_RESERVED:
 399             (44 <= type && type <= 511)   ? RANGE_HNCP_UNASSIGNED:
 400             (768 <= type && type <= 1023) ? RANGE_DNCP_PRIVATE_USE:
 401                                             RANGE_DNCP_FUTURE_USE;
 402         if (type == 6 || type == 7)
 403             type_mask = RANGE_DNCP_FUTURE_USE;
 404
 405         /* defined types */
 406         {
 407             t = 0;
 408             while (1) {
 409                 u_int key = type_values[t++].v;
 410                 if (key > 0xffff)
 411                     break;
 412                 if (key == type) {
 413                     type_mask = type;
 414                     break;
 415                 }
 416             }
 417         }
 418
 419         if (in_line) {
 420             if (last_type_mask == type_mask) {
 421                 last_type_count++;
 422             } else {
 423                 print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
 424                 last_type_mask = type_mask;
 425                 last_type_count = 1;
 426             }
 427
 428             goto skip_multiline;
 429         }
 430
 431         ND_PRINT((ndo,"%s", tok2str(type_values, "Easter Egg (42)", type_mask) ));
 432         if (type_mask > 0xffff)
 433             ND_PRINT((ndo,": type=%u", type ));
 434         ND_PRINT((ndo," (%u)", bodylen + 4 ));
 435
 436         switch (type_mask) {
 437
 438         case DNCP_REQUEST_NETWORK_STATE: {
 439             if (bodylen != 0)
 440                 ND_PRINT((ndo, " %s", istr));
 441         }
 442             break;
 443
 444         case DNCP_REQUEST_NODE_STATE: {
 445             const char *node_identifier;
 446             if (bodylen != 4)
 447                 goto invalid;
 448             node_identifier = format_nid(value);
 449             ND_PRINT((ndo, " NID: %s", node_identifier));
 450         }
 451             break;
 452
 453         case DNCP_NODE_ENDPOINT: {
 454             const char *node_identifier;
 455             uint32_t endpoint_identifier;
 456             if (bodylen != 8)
 457                 goto invalid;
 458             node_identifier = format_nid(value);
 459             endpoint_identifier = EXTRACT_32BITS(value + 4);
 460             ND_PRINT((ndo, " NID: %s EPID: %08x",
 461                 node_identifier,
 462                 endpoint_identifier
 463             ));
 464         }
 465             break;
 466
 467         case DNCP_NETWORK_STATE: {
 468             uint64_t hash;
 469             if (bodylen != 8)
 470                 goto invalid;
 471             hash = EXTRACT_64BITS(value);
 472             ND_PRINT((ndo, " hash: %016" PRIx64, hash));
 473         }
 474             break;
 475
 476         case DNCP_NODE_STATE: {
 477             const char *node_identifier, *interval;
 478             uint32_t sequence_number;
 479             uint64_t hash;
 480             if (bodylen < 20)
 481                 goto invalid;
 482             node_identifier = format_nid(value);
 483             sequence_number = EXTRACT_32BITS(value + 4);
 484             interval = format_interval(EXTRACT_32BITS(value + 8));
 485             hash = EXTRACT_64BITS(value + 12);
 486             ND_PRINT((ndo, " NID: %s seqno: %u %s hash: %016" PRIx64,
 487                 node_identifier,
 488                 sequence_number,
 489                 interval,
 490                 hash
 491             ));
 492             hncp_print_rec(ndo, value+20, bodylen-20, indent+1);
 493         }
 494             break;
 495
 496         case DNCP_PEER: {
 497             const char *peer_node_identifier;
 498             uint32_t peer_endpoint_identifier, endpoint_identifier;
 499             if (bodylen != 12)
 500                 goto invalid;
 501             peer_node_identifier = format_nid(value);
 502             peer_endpoint_identifier = EXTRACT_32BITS(value + 4);
 503             endpoint_identifier = EXTRACT_32BITS(value + 8);
 504             ND_PRINT((ndo, " Peer-NID: %s Peer-EPID: %08x Local-EPID: %08x",
 505                 peer_node_identifier,
 506                 peer_endpoint_identifier,
 507                 endpoint_identifier
 508             ));
 509         }
 510             break;
 511
 512         case DNCP_KEEP_ALIVE_INTERVAL: {
 513             uint32_t endpoint_identifier;
 514             const char *interval;
 515             if (bodylen < 8)
 516                 goto invalid;
 517             endpoint_identifier = EXTRACT_32BITS(value);
 518             interval = format_interval(EXTRACT_32BITS(value + 4));
 519             ND_PRINT((ndo, " EPID: %08x Interval: %s",
 520                 endpoint_identifier,
 521                 interval
 522             ));
 523         }
 524             break;
 525
 526         case DNCP_TRUST_VERDICT: {
 527             if (bodylen <= 36)
 528                 goto invalid;
 529             ND_PRINT((ndo, " Verdict: %u Fingerprint: %s Common Name: ",
 530                 *value,
 531                 format_256(value + 4)));
 532             safeputs(ndo, value + 36, bodylen - 36);
 533         }
 534             break;
 535
 536         case HNCP_HNCP_VERSION: {
 537             uint16_t capabilities;
 538             uint8_t M, P, H, L;
 539             if (bodylen < 5)
 540                 goto invalid;
 541             capabilities = EXTRACT_16BITS(value + 2);
 542             M = (uint8_t)((capabilities >> 12) & 0xf);
 543             P = (uint8_t)((capabilities >> 8) & 0xf);
 544             H = (uint8_t)((capabilities >> 4) & 0xf);
 545             L = (uint8_t)(capabilities & 0xf);
 546             ND_PRINT((ndo, " M: %u P: %u H: %u L: %u User-agent: ",
 547                 M, P, H, L
 548             ));
 549             safeputs(ndo, value + 4, bodylen - 4);
 550         }
 551             break;
 552
 553         case HNCP_EXTERNAL_CONNECTION: {
 554             /* Container TLV */
 555             hncp_print_rec(ndo, value, bodylen, indent+1);
 556         }
 557             break;
 558
 559         case HNCP_DELEGATED_PREFIX: {
 560             int l;
 561             if (bodylen < 9 || bodylen < 9 + (value[8] + 7) / 8)
 562                 goto invalid;
 563             ND_PRINT((ndo, " VLSO: %s PLSO: %s Prefix: ",
 564                 format_interval(EXTRACT_32BITS(value)),
 565                 format_interval(EXTRACT_32BITS(value + 4))
 566             ));
 567             if ((l = print_prefix(ndo, value + 8, bodylen - 8)) < 0)
 568                 goto invalid;
 569             l += 8 + (-l & 3);
 570
 571             if (bodylen >= l)
 572                 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
 573         }
 574             break;
 575
 576         case HNCP_PREFIX_POLICY: {
 577             uint8_t policy;
 578             if (bodylen < 1)
 579                 goto invalid;
 580             policy = value[0];
 581             ND_PRINT((ndo, " type: "));
 582             if (policy == 0) {
 583                 if (bodylen != 1)
 584                     goto invalid;
 585                 ND_PRINT((ndo, "Internet connectivity"));
 586             } else if (policy >= 1 && policy <= 128) {
 587                 ND_PRINT((ndo, "Dest-Prefix: "));
 588                 print_prefix(ndo, value, bodylen);
 589             } else if (policy == 129) {
 590                 ND_PRINT((ndo, "DNS domain: "));
 591                 print_dns_label(ndo, value+1, bodylen-1, 1);
 592             } else if (policy == 130) {
 593                 ND_PRINT((ndo, "Opaque UTF-8: "));
 594                 safeputs(ndo, value + 1, bodylen - 1);
 595             } else if (policy == 131) {
 596                 if (bodylen != 1)
 597                     goto invalid;
 598                 ND_PRINT((ndo, "Restrictive assignment"));
 599             } else if (policy >= 132) {
 600                 ND_PRINT((ndo, "Unknown (%u)", policy)); /* Reserved for future additions */
 601             }
 602         }
 603             break;
 604
 605         case HNCP_DHCPV4_DATA: {
 606             if (bodylen == 0)
 607                 goto invalid;
 608             if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0)
 609                 goto invalid;
 610         }
 611             break;
 612
 613         case HNCP_DHCPV6_DATA: {
 614             if (bodylen == 0)
 615                 goto invalid;
 616             if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0)
 617                 goto invalid;
 618         }
 619             break;
 620
 621         case HNCP_ASSIGNED_PREFIX: {
 622             uint8_t prty;
 623             int l;
 624             if (bodylen < 6 || bodylen < 6 + (value[5] + 7) / 8)
 625                 goto invalid;
 626             prty = (uint8_t)(value[4] & 0xf);
 627             ND_PRINT((ndo, " EPID: %08x Prty: %u",
 628                 EXTRACT_32BITS(value),
 629                 prty
 630             ));
 631             ND_PRINT((ndo, " Prefix: "));
 632             if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0)
 633                 goto invalid;
 634             l += 5;
 635             l += -l & 3;
 636
 637             if (bodylen >= l)
 638                 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
 639         }
 640             break;
 641
 642         case HNCP_NODE_ADDRESS: {
 643             uint32_t endpoint_identifier;
 644             const char *ip_address;
 645             if (bodylen < 20)
 646                 goto invalid;
 647             endpoint_identifier = EXTRACT_32BITS(value);
 648             ip_address = format_ip6addr(ndo, value + 4);
 649             ND_PRINT((ndo, " EPID: %08x IP Address: %s",
 650                 endpoint_identifier,
 651                 ip_address
 652             ));
 653
 654             hncp_print_rec(ndo, value + 20, bodylen - 20, indent+1);
 655         }
 656             break;
 657
 658         case HNCP_DNS_DELEGATED_ZONE: {
 659             const char *ip_address;
 660             int len;
 661             if (bodylen < 17)
 662                 goto invalid;
 663             ip_address = format_ip6addr(ndo, value);
 664             ND_PRINT((ndo, " IP-Address: %s %c%c%c ",
 665                 ip_address,
 666                 (value[16] & 4) ? 'l' : '-',
 667                 (value[16] & 2) ? 'b' : '-',
 668                 (value[16] & 1) ? 's' : '-'
 669             ));
 670             len = print_dns_label(ndo, value+17, bodylen-17, 1);
 671             if (len < 0)
 672                 goto invalid;
 673             len += 17;
 674             len += -len & 3;
 675             if (bodylen >= len)
 676                 hncp_print_rec(ndo, value+len, bodylen-len, indent+1);
 677         }
 678             break;
 679
 680         case HNCP_DOMAIN_NAME: {
 681             if (bodylen == 0)
 682                 goto invalid;
 683             ND_PRINT((ndo, " Domain: "));
 684             print_dns_label(ndo, value, bodylen, 1);
 685         }
 686             break;
 687
 688         case HNCP_NODE_NAME: {
 689             u_int l;
 690             if (bodylen < 17)
 691                 goto invalid;
 692             l = value[16];
 693             if (bodylen < 17 + l)
 694                 goto invalid;
 695             ND_PRINT((ndo, " IP-Address: %s Name: ",
 696                 format_ip6addr(ndo, value)
 697             ));
 698             if (l < 64) {
 699                 safeputchar(ndo, '"');
 700                 safeputs(ndo, value + 17, l);
 701                 safeputchar(ndo, '"');
 702             } else {
 703                 ND_PRINT((ndo, "%s", istr));
 704             }
 705             l += 17;
 706             l += -l & 3;
 707             if (bodylen >= l)
 708                 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
 709         }
 710             break;
 711
 712         case HNCP_MANAGED_PSK: {
 713             if (bodylen < 32)
 714                 goto invalid;
 715             ND_PRINT((ndo, " PSK: %s", format_256(value)));
 716             hncp_print_rec(ndo, value + 32, bodylen - 32, indent+1);
 717         }
 718             break;
 719
 720         case RANGE_DNCP_RESERVED:
 721         case RANGE_HNCP_UNASSIGNED:
 722         case RANGE_DNCP_PRIVATE_USE:
 723         case RANGE_DNCP_FUTURE_USE:
 724             break;
 725
 726         }
 727     skip_multiline:
 728
 729         i += 4 + bodylen + (-bodylen & 3);
 730     }
 731     print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
 732
 733     return;
 734
 735  trunc:
 736     ND_PRINT((ndo, "%s", "[|hncp]"));
 737     return;
 738
 739  invalid:
 740     ND_PRINT((ndo, "%s", istr));
 741     return;
 742 }